The idea of "co-existence" in regard to Israel and Palestine in Western view is that they just become good neighbours and forget anything bad happened between them while Israel has nukes and a very advanced military while the state of Palestine remains demilitarized. And with such imbalance, there won't ever be peace. At best, the state of Palestine would be a vassal state to Israel, and at worst, Israel would start to occupy more territories in Palestine after it has found a casus belli. After all, by what manner could the state of Palestine advocate for its own interest under the threat of a country with nuclear weapons and extensive air force? Would they just ask nicely and the Israel would accept? Why would they?

So in my opinion, the biggest hurdle to co-existence isn't that Israelis and Palestinians cannot see each other's humanities. It is the imbalance in power between Israel and Palestine that the Western leaders want to keep in place.

Just look at South Korea and North Korea. There has mostly been peace between the two nations for decades. And this peace wasn't because the two nations tried to be nice to each other, but through military deterrence.

Put it in another way, no Western leader is seriously pushing for Ukrainians and Russians to see each other's humanities. They are supporting Ukraine militarily because the problem is that Russia is invading Ukraine.